From 59d3391e8cf274097c42369866070c565891bae5 Mon Sep 17 00:00:00 2001 From: "Guilherme G. Piccoli" Date: Mon, 18 Sep 2017 11:16:58 -0300 Subject: powerpc/xmon: Add option to show uptime information It might be useful to quickly get the uptime of a running system on xmon, without needing to grab data from memory and doing math on struct addresses. For example, it'd be useful to check for how long after a crash a system is on xmon shell or if some test was started after the first test crashed (and this 2nd test crashed too into xmon). This small patch adds the 'U' command, to accomplish this. Suggested-by: Murilo Fossa Vicentini Signed-off-by: Guilherme G. Piccoli [mpe: Display units (seconds), add sync()/__delay() sequence] Signed-off-by: Michael Ellerman --- arch/powerpc/xmon/xmon.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'arch/powerpc/xmon') diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index d9a12102b111..4679aeb84767 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -278,6 +278,7 @@ Commands:\n\ #elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E) " u dump TLB\n" #endif +" U show uptime information\n" " ? help\n" " # n limit output to n lines per page (for dp, dpa, dl)\n" " zr reboot\n\ @@ -905,6 +906,26 @@ static void remove_cpu_bpts(void) write_ciabr(0); } +/* Based on uptime_proc_show(). */ +static void +show_uptime(void) +{ + struct timespec uptime; + + if (setjmp(bus_error_jmp) == 0) { + catch_memory_errors = 1; + sync(); + + get_monotonic_boottime(&uptime); + printf("Uptime: %lu.%.2lu seconds\n", (unsigned long)uptime.tv_sec, + ((unsigned long)uptime.tv_nsec / (NSEC_PER_SEC/100))); + + sync(); + __delay(200); \ + } + catch_memory_errors = 0; +} + static void set_lpp_cmd(void) { unsigned long lpp; @@ -1040,6 +1061,9 @@ cmds(struct pt_regs *excp) dump_tlb_book3e(); break; #endif + case 'U': + show_uptime(); + break; default: printf("Unrecognized command: "); do { -- cgit v1.2.3